Posted: 05/08/2016 at 12:41
Pokhim, avoid Vigorous reeds. They will over run your tank.
once built a wildlife pond for a friend only to see an enthusiastic "expert" plant the wrong sort of iris and reed in it. Coincidentally I was there yesterday and it was so overgrown I almost walked into it. All "scale" was lost
One dwarf water lily only for me there......again, to echo your white hydrangeas, I would plant a white lily. queen Victoria lobelia in a pot in the corner would look good. Red foliage all summer with scarlet flowers.
get some of the tank in the ground and try to raise some soil and planting around it. Take your time to get it right...have a few ideas; have a plan that has been edited a few times